Plunger sash-weight-molding apparatus



PLUNGER SASH WEIGHT MOLDING APPARATUS Filed March 5,. 192:5

INVENTOR:

ATTORNEYS.

Patented May 5, 1925.

PATIENT ol-"r cs.

GEORGE J. FO'X, or FRANKFORD, PENNSYLVANIA.

PLUNGER sAsH-wEIeHr-MoLnmG APPARATUS.

Application filed March a, 1923. seria no. 622,496.

To all whom it 'mag concern: i I Be it known that I, GEORGE J. Fox, a citizen of the United States, residing at Frankford, county of Philadelphia,- State of Pennsylvania, have invented a new and useful Plunger Sash-IVeight Molding Apparatus, of which the following is a specification.

My invention relates to a novel construction of a plunger sash weight molding apparatus, wherein I dispense with much expensive and superfluous. mechanism and steps heretofore employed, and whereby I am enabled to mold sash weights or other straight castings of various shapes in cross section without jolting or ramming and I also dispense with the necessity of a cope or top-for the mold. By my novel method andapparatus an unlimited production can be attained at a low cost by unskilled labor, and there is no handling or reversal of the flask required. i

It further consists of a novel manner of forming the eye in the outer end of the sash weight casting by theemployment of novel cores, whereby a large number of finished weights without fins or protuberances are produced at eachoperation of any desired length of unusual smoothness and uniformity.

It further consists of other novel features of construction and' advantage all as will be hereinafter set forth and pointed out in the claims.

For the purpose of illustrating my invent1on,I have shownin the accompanying drawings forms thereof which. are atpresent preferred by me, sincethey will give in *practice satisfactory and reliable results, 'al though it is to be understood that the var-i ous instrumentalities of which my invention consists canbe variously arranged and orgauized and tliatfmy invention jis not limited to the precise arrangement and organization of these instrumentalities as herein Y shown and described. p l v Figure 1 represents a perspective view of the plunger and patterns,strippingplate, and, flask of a plunger moldingapparatus,

embodying myinvention. v

. Figure 2 represents-a sectional view of the stripping platein detached position.

Figure 3 represents a vertical sectional View of the plunger, stripping plate and flask, the atterns being shown in elevation,

showing t e manner of forming the mold.

Figure 4 represents a vertical sectional view of the mold with the cores in place ready to pour.

a sectional. view of the upper left-hand portionof Figure 4c.

, Figure 7 represents, on an enlarged scale, a perspective view of a core in detached position.

Figure 8 represents a --perspective view of a finishedsash weight produced by my method and apparatus.

Similar numerals of reference indicate corresponding parts. i

Referring to the drawings 1 designates the forming head or plunger composed of the plate or disc 2, from the top of which projectsthe rod 8, While from the bottom thereof project or depend the patterns 4;, which are of the generalcontour of the sash weights, or other articles to be produced, being in the present instance cylindrical in cross section and provided with tapered or ehainfered points or lower terminals 5. Y I

6 designates the -forming box or flask and 7 the sand therein. -8 designates the stripping or pattern plate having the holes 9 therein, which is adapted to be placed upon the top of the flask 6, said stripping plate having the central-boss 10 projecting from the bottom thereof, from which radi ate the radial ribs or forms 11 whose bottom edges converge upwardly and inwardly, so as to produce the radlal outwardly inclined gates 12, in the top of the sand, which radiatefrOIn the central basin 13, formed by the boss 10 in the top of the sand as seen in Figures {1 and'5, Sflld'liLCllfll gates at their outer ends communlca-tingwith the holes lat forn'led in the sand by the descent of thepatterns t. The cores 15 are wedge-shaped, being conical or circular for the major p0:- tion of their upper area, as indicated at 16, and have the down *ardly converging walls 17 andlS, andthe horizontal slot 1.9 there- I through, whereby their upper outer portion fits nicely 1n the upper ends'of the holes 14,

but leave a passage or gate'as 20, see Figures 4 and 6, for the metal to flow to the holes 17. It will be understood that the I bottom 21of the flask is perforated, and that terns 'into the sand through the stripping plate to a depth determined by the length of the sash weight required. The plunger is then reversed and the patterns withdrawn, and the pattern plate or stripping plate 8 removed. The cores 15\ are then dropped into the tops of the holes 14:,

whereby the eye Q-l in the finished weight 25 is formed, and the mold now appears as seen in Figures 4:, 5 and 6 and is ready to pour, the metal flowing from the central basin 13 to the runners or gates 12 to each mold 1%. By adjusting the-.lengthof the stroke of the plunger 1, sash weights may be made of many lengths of? the .same patterns, and I further dispense with the cope and no jolting orramming is required as the displacement of the sand by the for ing' of the patterns,thereinto, displaces and packsthe sand to a. consistency compact enough to stand .the pressure of the iron dropping from the top of the mold to the bottom thereof.

It is desirable that the lower ends of the patterns which enter the sand be Cll'rllll,

fered so that thesand will be displaced and compacted enough to stand the strain ot pour-mg without packing toohard to take the iron, said patterns requiring no tapering otherthan attheir chamfered ends.

Iain aware that amachine has been proposed having aplur ality of patterns upon a plate, a flask placed upon the same and tilled with sand,'the same being jolted or rammed to make it compact and saidflask '1 er forces the pattern into said flask and this process of forcing the patterns into-the sand, eliminates all ramming and joltmg'. The pressure of forcing these patterns into this flask of loose sand, not rammed or jolted, displaces and packs the sand to a consistency compact enough to stand the pressure of their-n dropping from the top of the mold to the bottom thereof.

There isno handling or inversion of my flask required, as the same is constantly maintained in one position, as seen in Figures 1, 3 and '1 My patterns by any simple mechanicalmeans, which it is not necessary to describe in detail, are forced into the sand as seen in Figure 8,-the weightol the patterns, serving to assist in a. natural manner in'the forming of the molds, and upon the upward withdrawal of1the patterns and the removal of the plate ft, the

mold appears as seen in Figures and 6 and is ready to pour, no cope being required.

The employment of-the cores 15 having the inclinedwall 1?, which meets the top of the core to fornrthe wall or cut away portion 26, enables me to form agood looking eye 2-4: at the top of the weight, whiclris amply reinforced bythe top cross bar 27, seen in Figure 8, which is a much better construction Ethan that having the eyes formed of a separate wire cast into the top of the weight, as has heretofore'been done.

KIC will be understood that my process and apparatus are adapted to the molding and casting of other devices than sash weights as the patterns may he of polygonal contour instead of cylindricahin cross section, and for casting other articles than sash weights, the cores may not need to be employed, as is evident.

It will nowbe apparent that I have devised a novel and useful plunger sash weightmolding apparatus which embodies the features of advantage enumerated as desirable inkthe statement of the invention and the above description, and while I have, in-the present instance, shown and described a. preferred embodiment thereof which will give in practice satisfactory and reliable resultsit is to be understood that such embodiment is susceptible -.of modification in various particulars without departing from the spirit-or scopeof the inventionor sacrificing any of its advantages.

rality of patterns of solid cross section and arranged in circular form having chamfered ends through the apertures in said plate into said sand, next withdrawing said patterns ltlt) ing slotted wedge shaped cores in said molds to form the sash weight eyes. 7

2. In a device of the character stated the combination of a flask open at its top and closed at its bottom, a pattern plate having a plurality of radially disposed apertures and arranged in circularform secured to the top of said flask andhaving a central bottom boss and radial inclined ridges on its bottom for forming a central basin and radial gates in the top of the sand, a plunger having 'a plurality of-pendant patterns of solid cross section arranged in circular form, adapted to be moved axiallyto enter the sand and upwardly when withdrawn from thesand, and wedge shaped slotted cores inserted in the top of the molds formed by said patterns.

3. In a. plunger sash weight molding ap paratus, a flask open at "its top and closed 7 at its bottom, a plate having a plurality of radially disposed apertures arranged in 011'- cular form, means for clamping said plate to the top of said flask, a boss in'the bottom of said plate to form a central basin and downwardly and outwardly inclined gates in the sand, and a plunger having a plurality of pendant patterns arranged in circular form movable axially'to enter the top of the sand in said flask, to form themolds,

the upward movement of said patterns withdrawing them from the sand, whereby no inversion of said'fla-sk is required and a cope is dispensed with.

4. In a plunger sash weight molding apparatus, a flask open at its'top and closed at its bottom, a stripper plate for the top of a said flask having a plurality of radially disposed apertures arranged in circular form and having a boss on its bottom for vforming in the sand a central basin and radial gates, and. a moving plunger carrying a plurality ofpatterns arranged in circular form having chamfered ends adapted to enter the top'of the sand to form the molds, whereby no inversion of said flask is required and a cope is dispensed with. l a a 5. In a plunger sash weight molding apparatus, a flask open at its top and closed at its bottom, a plate having a plurality of radially disposed apertures arranged in circular form, means for clamping said plate to the top of said flask, means on the bottom of said plate to form a central basin and downwardly and outwardly inclined gates in the sand, and a plunger having a plurality of pendant patterns arranged in circular form movable axially to enter the top of the sand in said flask to form the molds, the upward movement of said patterns withdrawing them from the sand, whereby no inversion of said flask is required, and a cope is dispensed with, in combination with horizontally slotted cores positioned in the upper portions of said molds.

GEORGE J. FOX.

, lVitnesses: i

I. D. Ross, E. H. FOX. 

